Why does the modal window close when scrolling on the phone?

Question

Layout

When opening a modal window on the phone and scrolling it, the modal window collapses (and it closes very strangely, it closes immediately after scrolling, then from 2-3 times) Bootstrap
template, its example at this link preview.hotbootstrap.com/y_beauty
Strange, that on the desktop version of the site there are no complaints about the modal window.
If you need a working version of the site with such a problem, I will write

Answer 1

Most likely, during the scroll, the finger clings to the button / zone of closing the window. Look at the location of all these zones and their triggers (you can also log the console for closing events and see who was called)